Robtex

Up: 63.227.234.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 63.227.234.0/25
Down right: 63.227.234.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
63.227.234.10	A+PTR	medvoicemail.com
63.227.234.252	A+PTR	mail.medvoice.com
63.227.234.252	PTR	mail.teltrax.com
63.227.234.252	A	medvoice.com
63.227.234.253	A+PTR	secure.medvoice.com
63.227.234.253	A+PTR	sms.medvoice.com
63.227.234.253	A+PTR	www.secure.medvoice.com